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C. Buchegger, R. Koos, W. Lengauer, K. Rödiger, H. van den Berg:
"Hardmetals with alternative Fe/Co/Ni and Fe/Ni binders - a study on Mo doping, mechanical properties and creep behaviour";
Talk: Euro PM2013 Powder Metallurgy Congress & Exhibition, Göteborg; 09-15-2013 - 09-18-2013; in: "Proceedings Euro PM2013", European Powder Metallurgy Association, Shrewsbury UK (2013), 978-1-1899072-31-1; 1 - 9.

Properties of hardmetals with a Fe/Co/Ni = 40/20/40 wt.% binder alloy were measured. Green bodies were prepared on a usual powder metallurgical route and sintered under vacuum conditions. The sintering behaviour of hardmetals in dependency on the binder content, and Mo-addition from various sources such as molybdenum nitride, molybdenum carbide and alloyed molybdenum was investigated by dilatometry. Microstructure analysis shows an improved grain-growth inhibiting effect of -MoN1-x as compared to both Mo2C and alloyed Mo. Hardness HV30, fracture toughness K1C, magnetic saturation and coercive force were determined as a function of the carbon content. The influence of WC grain-size on the creep behaviour was compared to cobalt containing and a cobalt-free Fe/Ni = 15/85 wt.% binder alloy by a three-point bending test under power-law conditions. From experimental data creep parameters such as Norton exponents (n = 3.7 - 8.7) and activation energies (Q = 313 - 318 kJ/mol) were estimated.

Properties of hardmetals with a Fe/Co/Ni = 40/20/40 wt.% binder alloy were measured. Green bodies were prepared on a usual powder metallurgical route and sintered under vacuum conditions. The sintering behaviour of hardmetals in dependency on the binder content, and Mo-addition from various sources such as molybdenum nitride, molybdenum carbide and alloyed molybdenum was investigated by dilatometry. Microstructure analysis shows an improved grain-growth inhibiting effect of -MoN1-x as compared to both Mo2C and alloyed Mo. Hardness HV30, fracture toughness K1C, magnetic saturation and coercive force were determined as a function of the carbon content. The influence of WC grain-size on the creep behaviour was compared to cobalt containing and a cobalt-free Fe/Ni = 15/85 wt.% binder alloy by a three-point bending test under power-law conditions. From experimental data creep parameters such as Norton exponents (n = 3.7 - 8.7) and activation energies (Q = 313 - 318 kJ/mol) were estimated.